Pound/sq inch to Pound/sq foot Converter
Convert Pound/sq inch (psi) to Pound/sq foot (psf) instantly. 1 psi = 144 psf.
Pressure Converter
29 units available
1 psi = 144 psf
Formula:
psf = psi × 144With your value: 1 psi = 144 psf
Other Pound/sq inch to Pound/sq foot conversions
Pound/sq inch to Pound/sq foot Conversion Table
| Pound/sq inch (psi) | Pound/sq foot (psf) |
|---|---|
| 0.5 | 72 |
| 1 | 144 |
| 2 | 288 |
| 5 | 720 |
| 10 | 1,440 |
| 15 | 2,160 |
| 20 | 2,880 |
| 25 | 3,600 |
| 50 | 7,200 |
| 100 | 14,400 |
| 250 | 36,000 |
| 500 | 72,000 |
| 1000 | 144,000 |
Pound/sq foot to Pound/sq inch Conversion Table
| Pound/sq foot (psf) | Pound/sq inch (psi) |
|---|---|
| 0.5 | 0.003472 |
| 1 | 0.006944 |
| 2 | 0.013889 |
| 5 | 0.034722 |
| 10 | 0.069444 |
| 15 | 0.104167 |
| 20 | 0.138889 |
| 25 | 0.173611 |
| 50 | 0.347222 |
| 100 | 0.694444 |
| 250 | 1.736111 |
| 500 | 3.472222 |
| 1000 | 6.944444 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Pound/sq inch (psi)
Pressure
1 psi = 1 lbf/in² = 6894.757 293 168 361 Pa exactly.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Pound/sq foot (psf)
Pressure
Derived from the pascal (1 Pa = 1 N/m²). The standard atmosphere is exactly 101 325 Pa.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Pound/sq inch to Pound/sq foot
To convert from Pound/sq inch (psi) to Pound/sq foot (psf), multiply the value by 144.
Formula: psf = psi × 144
Reverse: psi = psf × 0.0069444444
Step-by-Step Example
- Start with your value in Pound/sq inch. For example: 5 psi
- Multiply by the conversion factor: 5 x 144
- The result is: 720 psf
About Pound/sq inch
Pounds per square inch (psi) is an imperial unit of pressure widely used in the US for tire pressure, hydraulics, and engineering.
Common uses: tire pressure (US), hydraulics, HVAC.
About Pound/sq foot
The pound/sq foot (psf) is a unit of pressure and stress. One pound/sq foot equals 47.88025898 pascals. UnitConvertLab converts it against every other pressure unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: pressure calculations, engineering and science, education.
Frequently Asked Questions
How many Pound/sq foot are in 1 Pound/sq inch?
There are exactly 144 Pound/sq foot in 1 Pound/sq inch. This means the conversion factor from Pound/sq inch to Pound/sq foot is 144.
What is the formula to convert Pound/sq inch to Pound/sq foot?
The formula to convert Pound/sq inch to Pound/sq foot is: psf = psi × 144. For example, to convert 10 Pound/sq inch to Pound/sq foot, you would multiply 10 by 144.
What is a Pound/sq inch?
Pounds per square inch (psi) is an imperial unit of pressure widely used in the US for tire pressure, hydraulics, and engineering.
What is a Pound/sq foot?
The pound/sq foot (psf) is a unit of pressure and stress. One pound/sq foot equals 47.88025898 pascals. UnitConvertLab converts it against every other pressure unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What are the common uses of Pound/sq inch?
The Pound/sq inch is commonly used in tire pressure (US), hydraulics, HVAC.
Related Pressure Conversions
Cite this page
UnitConvertLab. (2026). Pound/sq inch to Pound/sq foot converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/psi-to-psf